IT problems and solutions from our everyday IT life, worth writing and remembering. Knowledge should be shared, NOT KEPT!
host yy.com [XXX.XXX.XXX.XXX] said:
550-Verification failed for <firstname.lastname@example.org> 550-No such person at this
address" 550 Sender verify failed (in reply to RCPT TO command)
A custom (non paid) certificate is about to expiry and you are afraid that your web clients won't be able to login, or have problems logging in due to that certificate expiration?
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